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P-202H Plus v2 User’s Guide
Chapter 12 NetCAPI
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H A P T E R
12
NetCAPI
This chapter covers the NetCAPI screen.
12.1 NetCAPI Overview
Your ZyXEL Device supports NetCAPI. NetCAPI is ZyXEL's implementation of CAPI
(Common ISDN Application Program Interface) capabilities over a network. It runs over DCP
(Device Control Protocol) developed by RVS-COM.
(Common ISDN Application Program Interface) capabilities over a network. It runs over DCP
(Device Control Protocol) developed by RVS-COM.
NetCAPI can be used for applications such as Eurofile transfer, file transfer, G3/G4 Fax,
Autoanswer host mode, telephony, etc. on Windows 95/98/NT platforms.
Autoanswer host mode, telephony, etc. on Windows 95/98/NT platforms.
12.2 CAPI
CAPI is an interface standard that allows applications to access ISDN services. Several
applications can share one or more ISDN lines. When an application wants to communicate
with an ISDN terminal it sends a series of standard commands to the terminal. The CAPI
standard defines the commands and allows you to use a well-defined mechanism for
communications using ISDN lines.
applications can share one or more ISDN lines. When an application wants to communicate
with an ISDN terminal it sends a series of standard commands to the terminal. The CAPI
standard defines the commands and allows you to use a well-defined mechanism for
communications using ISDN lines.
CAPI also simplifies the development of ISDN applications through many default values that
do not need to be programmed. It provides a unified interface for applications to access the
different ISDN services such as data, voice, fax, telephony, etc.
do not need to be programmed. It provides a unified interface for applications to access the
different ISDN services such as data, voice, fax, telephony, etc.
12.2.1 ISDN-DCP
ISDN-DCP allows a computer on the LAN to use services such as transmitting and receiving
faxes as well as placing and receiving phone calls.
faxes as well as placing and receiving phone calls.
Using ISDN-DCP, the ZyXEL Device acts as a DCP server. By default, the ZyXEL Device
listens for DCP messages on TCP port number 2578 (the Internet-assigned number for RVS-
COM DCP). When the ZyXEL Device receives a DCP message from a DCP client i.e., a
computer, the ZyXEL Device processes the message and acts on it. Your ZyXEL Device
supports all the DCP messages specified in the ISDN-DCP specification.
listens for DCP messages on TCP port number 2578 (the Internet-assigned number for RVS-
COM DCP). When the ZyXEL Device receives a DCP message from a DCP client i.e., a
computer, the ZyXEL Device processes the message and acts on it. Your ZyXEL Device
supports all the DCP messages specified in the ISDN-DCP specification.